optgroup class gets applied to all sub-options in FF, why?

[Zv00n]

I have an optgroup like this:\[code\] <optgroup label="Eller v?lj L?n" title="Eller v?lj L?n" style="background-color:#FC9;"> <option value="http://stackoverflow.com/questions/2850093/Blekinge L?n">Blekinge</option> <option value="http://stackoverflow.com/questions/2850093/Dalarna L?n">Dalarna</option> <option value="http://stackoverflow.com/questions/2850093/Gotlands L?n">Gotland</option> </optgroup>\[/code\]Problem is, only in Firefox, the class applies to all options inside the optgroup.I need it to apply only to the optgroup label...Any ideas why?Thanks